Force-feed lubricator.



c. c. WAKEFIELD.

I FORGE FEED LUBRIGATOB.

APPLICATION FILED, 001'. 17,1907.

912,337. Patented Feb. 16,1909.

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o. 0. WAKEFIELD. FORGE FEED LUBRIOATOR.

APPLICATION FILED OGT. 17,1907.

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912,337. 4 Patented Feb. 16, 1909.'

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C. G. WAKEFIELD.

.' PORCH FEED LUBRIGATOR.

APPLICATION TILED oo'r. 17,1901.

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G. C. WAKEFIELD.

FORGE FEED LUBBIGATOR. APPLIOAIION FILED 001. 17,1901.

Patented Feb. 16, 1909.

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. CHARLES CHEERS WAKEFIELD, OF LONDON, ENGLAND.

FORCE-FEED LUBRICATOR.

Specification of Letters Patent.

Patented Feb. 16, 1909.

Application filed. October 17, 1907. Serial No. 397,883.

- To all whom it may concern:

Be it known that 1, CHARLES CHEERS WAKEFIELD, a subject of the King of Great Britain, and residing at London, England, have invented certain new and useful Improvements in Force-Feed Lubricators, of which the following is a specification.

This invention is for improvements in force-feed lubricators of the sight-feed type, and has for its object to provide a lubricator wherein the lubricant after having passed the sight-feed portion of the apparatus may be positively driven forward towards the part to be lubricated.

In carrying out this invention mechanism is provided between the sight-feed device and the part to be lubricated, whereby the lubricant, after passing the sight-feed, may be positively advanced towards the part to be lubricated.

A further feature of this invention consists in providing means whereby backpressure on the sight-feed device may be prevented, in order that the lubricant may be passed into a steam pipe or other part under pressure without such pressure being communicated to the sight-feed. The apparatus for passing the lubricant on from the sight-feed to the part to be lubricated conveniently takes the form of a plunger-operated pump situated between the sight-feed, (which may comprise a liquid-containing transparent tube), and the part to be lubricated, so that the valves of the pump serve to prevent back-pressure on the sight-feed.

The lubricant may be fed to the tube by a second pump and when so arranged the pumps are so connected that while one is performing its in-take stroke, the other is performing its discharge stroke.

In the accompanying drawings which illustrate one method of carrying out this invention, Figure 1 is a side elevation of the lubricator, Fig. 2 is a front elevation of the same in part section, Fig. 3 is a vertical section on the line 33 of Fig. 2, and Fig. 4 is a vertical section on the line 44 of Fig. 1.

The base A of the lubricator is made to constitute an oil-reservoir and carries a series of sight-feed tubes B. These are of glass and are filled with water in the well known manner so that the lubricant entering the bottom of the tubes can be seen passing through the water therein to the top of the same. At the base of each tube is a non-return valve B which controls a conduit B that communicates with the reservoir A by way of conduit C A. The conduit C constitutes a pump barrel wherein slides a lunger C and a non-return valve C contro s the admission of lubricant from the reservoir A by the conduit A to the barrel C The flow of lubricant from the reservoir to the conduit A may be regulated by an adjustable valve A which extends through the wall of the reservoir so that it may be operated by hand from without the same.

The upper end B of the sight-feed tube communicates, by way of a conduit B and a non-return valve B with a conduit D that constitutes a second pump barrel where in slides a plunger D. This conduit D has communication with a conduit E, and a nonreturn valve D permits passage of the lubricant into the conduit E but prevents return of the same to the conduit D That end of the conduit E remote' from the valve D communicates with the part to'be lubricated and may be connected to one of the steamsupply pipes or to the steam-chest of the engine with which the lubricator may be employed. Where steam is available, a small jet of steam may be admitted to the pipe E in proximity to the valve D for the purpose of aiding the passage of the lubricant to the part to be lubricated. For this purpose a small conduit F is shown, one end of which enters the conduit E while its other end may communicate direct with the boiler.

The pump plungers C D are disposed approximately parallel to the sight-feed tube B and are made integral so that a single eccentric G working in a slot D formed in the plungers may serve to operate both plungers. The eccentric is carried by a shaft G which may be driven by any suitable mechanism.

The operation of this lubricator is as followsW'hen the eccentric G is rotated the plungers C and D will be constantly reciprocated, and they are so arranged that when the plunger 0 is performing its iii-take stroke, the plunger D will be performing its discharge stroke. In the drawing the plunger D has just completed its discharge stroke, and the plunger C has sucked in a charge of lubricant from the reservoir A past the valves A C Further movement of the eccentric will now cause the plunger C to descend, whereupon the valve C will close against the pressure thus put u on the lubricant in the barrel C and the ubricant will be advanced through the conduit B past the valve B into the sightfeedtube B. During this operation, however, the plunger D has simultaneously been performing. itsiiir-talze B into the pump-barrel D 1t Will thus be seen that no pressure is exerted upon the tube B by forcing lubricant into it, as thelplungers may be of the same cross-$ectiona area in order that the amount oflubricant Withdrawn may equal thatforced'into the tube.

During the in-take stroke of the plunger D the valve D remains closed, whereby bac=kpressure from the conduit E onto the tube B I is prevented irrespective of the presence of the valve B At the next reciprocation of the double plunger G D'lubrioant' is again drawn into the pump barrel C while that admitted to the barrel'D lS'llO'W fOrcedfor- Ward past the valve D into the conduitE. During the discharge stroke of' the plunger D, the valve B remains closed,- so that no backressure due to the operation of-thepump is brought to bear upon the tube B. It will thus be seen that by this device the lubricant 1 is fed by positive means to thesight-feed tube, and then passed on thence by ositive means towards the part to be lu ricated Without subjecting the tube to any pressure even though the plunger D may be employed to advance the lubricant into a steam conduit or other part undcr'steam pressure.

The conduit F admits steam from the boiler as has been already describedfor the v purpose of aiding the passage of the lubricant -to the )art to be lubricated after it-has passed the vi ve D and the steam in its passage to 40 this conduit may be led through passages cored in the body of the lubricator for the purpose of raising the temperature ofthe "lubricant should this be desired.

T he lower pump barrelsC are formed in 5 vertically disposed cores that may be cast Within the reservoir A, but they allow free passage of the lubricant around them so that t the whole of the chamber-A is available as a reservoir. Across the base of these barrels is a horizontal Web H through Which apassage H is formed. This passage communicates at one end with the steam-supply pipe from the boiler and at the other-end it is connected by a conduit H to ahorizontal passage H provided in the upper portion or head of the lubricatcr. This passage lies at the rear of the pump-barrels D and from itiextend the conduits F which communicate with the conduits E already referred to. Itwillthus be 0 seen that the steam on its Way to the conduits F is utilized by this means to raise the temperature of the lubricant so that it may be always maintainedin a sufficiently fluid condition to pass freely through the lubri- 5 cator.

.eant, enable any one tube to be thrown out ln the drawings a two-tube lubricator is shown, but obviously; the invention is not restricted to a two-tube device. The valves A in addition to regulating the flow of lubriof action-without stopping the operationof the shaft G What I claim as my invention and desire to secure by Letters Patent is p 1. In a lubricator the: combination of, a sight-feed chamber containing liquid Whose specific gravity is greater than" that of the lubricant, means for positively feeding lubricantinto the sight-feed chamber at one end; means for simultaneously Withdrawing} an equal quantity of'lubrican't from the otherend of the same for the purpose of'positively feeding lubricant through the sightfeed chamber Without subjecting the chamber to pressure, means for conducting the lubricant from the sight-feed chamber to the part to be lubricated, and means for relieving the chamber from back pressure, substantially as set forth.-

2. In a lubricator the combination of, a sight-feed chamber containing liquidwhose specific gravity is greater than that-ofoil, a reservoir for lubricant means: for drawing agiven quantity of lubricant from the reservoir and positively feeding'it into the sightfeed chamberat'one end, means for simulta neously Withdrawing an equal quantity of lubricant-from the other end of the same for the purpose of positively feeding lubricant through the sight-feed chamber withoutsubjecting the chamber to pressure, means for conducting the lubrieantfrom the sight feed chamber to the part to be lubricated, and means for relieving the chamberfrom ba'clrpressure, substantially as set forth.

3'. In a lubricator the combinationof, a sight feed chamber containing a liquid whose specific gravity is greater than'that" of the lubricant, a plunger-operated force pump for feeding lubricant to one end of the sightfeed chamber, a plunger-operated pump to receive the lubricant from the other end'of' the chamber and to force itforward against fluid pressure to the part to be lubricated; the inlet and discharge valves of this pump serving to prevent back-pressure on to the: sight-feed chamber, and means for operating the pumps in such manner that one performs its intake stroke While the other is: per forming its discharge stroke, substantially as set forth.

4. In a lubricator the combination of, a sight-feed tube containing a liquid whose specific gravity is greater than that of the lubricant, a force pump for-feedinglubricant to the base of this tube and-having a recipro cating plunger disposed approximately par-- allel Withthe tube, a seoond'force pump for receiving the lubricant from the upper end of the tube and forcing ittowards the partto'be 130 lubricated this pump having a plunger that Y also serving to prevent back-pressure on to 19 is made integral with that of the other pump the sight-tube substantially as set forth.

and also lies approximately parallel to the In testimony whereof I have signed my tube, and an eccentric disposed to operate in a name to th s specification in the presence of slot provided therefor in the double plunger two subscribing Witnesses. V

whereby the plunger is reciprocated in such CHARLES CHEERS WAKEFIELD. manner that the one pump performs its in Witnesses:

take stroke while the other performs its dis- H: D. JAMEsoN,

charge stroke the valves of the upper pump A. N U'ITING. 

